This kid whose name was jimmy in high school came up to me when I was doing homework in the hall?

I told him that I was 5'9 at the time and he said that im not 5'9 but 5'5 and it really made me feel offended because I am not 5'5 and I feel much taller then that in my height :( I recently measured myself and it was 5'9.5 or 5'10 now.